\(\frac{2}{5}:\frac{1}{2}\)
\(=\frac{2.2}{5.1}\)
\(=\frac{4}{5}\)
\(\frac{4}{5}.\frac{1}{2}\)
\(=\frac{4.1}{5.2}\)
\(=\frac{4}{10}=\frac{2}{5}\)
1/2+1/3+2/5=37/30
2/3+3/4-1/5=73/60
4/5 * 1/2 = 2/5
2/5:1/2=4/5
đúng 100%
Tính :
\(\frac{1}{2}+\frac{1}{3}+\frac{2}{5}=\frac{15}{30}+\frac{10}{30}+\frac{12}{30}=\frac{37}{30}\)
\(\frac{2}{3}+\frac{3}{4}-\frac{1}{5}=\frac{40}{60}+\frac{45}{60}-\frac{12}{60}=\frac{73}{60}\)
\(\frac{4}{5}\times\frac{1}{2}=\frac{4}{10}=\frac{2}{5}\)
\(\frac{2}{5}:\frac{1}{2}=\frac{2}{5}\times\frac{2}{1}=\frac{4}{5}\)
Ủng hộ !
1/2 + 1/3 + 2/5 = 5/6 + 2/5 = 37/30
2/3 + 3/4 - 1/5 = 17/12 - 1/5 = 73/60
4/5 x 1/2 = 2/5
2/5 : 1/2 = 4/5
tk mk nha mn.Love mn
a, 1/2 + 1/3 + 2/5 = 15/30 + 10/30 + 12/30 = 15+10+12 / 30 = 37/30
b, 2/3 + 3/4 - 1/5 = 40/60 + 45/60 - 12/60 = 40+45-12 / 60 = 73/60
c, \(\frac{4}{5}\times\frac{1}{2}=\frac{4\times1}{5\times2}=\frac{4}{10}=\frac{2}{5}\)
d, \(\frac{2}{5}\div\frac{1}{2}=\frac{2\times2}{5\times1}=\frac{4}{5}\)
